Base Station Symbol Processing for Carrier-Aligned Power Saving
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Solution Overview
Problem
Existing symbol power saving methods in base stations are inefficient due to high information resource occupation and complexity, particularly when multiple carriers share a power amplifier and different symbol lengths coexist, preventing effective power saving.
Innovation Solution
A method where the baseband unit determines target subframes for power saving, modifies their format to uniform symbol lengths, and aligns periodicities, allowing the radio unit to independently manage power amplifier states based on sampling point values, reducing the need for extensive information exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the RU exchanges information with the BBU in advance to learn symbol start location and length for power saving, then power saving can be performed on symbols, but a relatively large quantity of information resources are occupied and the process becomes cumbersome
Solution Approach 1:
The RU autonomously determines symbol power saving opportunities by detecting sampling points in idle subframes without requiring BBU coordination. The RU independently identifies when no data is being sent and shuts down the PA accordingly, eliminating the need for complex information exchange while maintaining effective power saving
Solution Approach 2:
The system configures idle subframes as MBSFN subframes in advance, which have predetermined symbol structures with fewer pilot symbols. This preliminary configuration enables the RU to automatically identify power saving opportunities without real-time communication with the BBU
2Productivity
If multiple carriers share one power amplifier with different symbol lengths, then resource utilization is improved, but symbol boundaries cannot be aligned and power saving cannot be performed
Solution Approach 1:
The patent applies different cyclic prefix lengths to different carriers (Carrier 1 uses normal CP, Carrier 2 uses extended CP), creating local differences in symbol lengths. This allows each carrier to maintain its optimal symbol structure while still enabling the RU to align symbol boundaries for power saving purposes by configuring idle subframes as MBSFN subframes
Data Source
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AI summary
This application provides a signal processing apparatus and a signal processing method. The signal processing apparatus includes a signal matching circuit, a first signal processing branch, and a second signal processing branch. An output end of the signal matching circuit is coupled to an input end of the first signal processing branch and an input end of the second signal processing branch, and an output end of the first signal processing branch is coupled to the input end of the second signal processing branch. According to the signal processing apparatus provided in this application, effective anti-interference processing can be performed on a non-linear cross-modulation product.